2个回答
展开全部
(掘弯1)4.5X+3.8X=16.6
解: 8.3X=16.6
X=16.6÷8.3
X=2
(2) 2X+16=64
解: 2X+16-16=64-16
2X=48
X=48÷2
X=24
(3) 1.3X÷2=2.6
解:判坦闷 1.3X÷2×2=2.6×2
1.3X=5.2
X=5.2÷1.3
X=4
(4) 4.5X+X=11
解: 5.5X=11
X=11÷5.5
X=2
(5) 2X-9=3.2
解: 2X-9+9=3.2+9
2X=12.2
X=12.2÷2
X=6.1
(6) (1-25%)X=72
解: 0.75X=72
X=72÷0.75
X=96
(7) (X+1/2X)=1/信则5
解: 3/2X=1/5
X=1/5÷3/2
X=1/5×2/3
X=2/15
(8) (1+10%)X=1.1
解: 1.1X=1.1
X=1.1÷1.1
X=1
(9) (2/3+1/3)X=9
解: 1X=9
X=9÷1
X=9
(10) (25%+46%)X=1.42
解: 0.71X=1.42
X=1.42÷1.72
X=2
解: 8.3X=16.6
X=16.6÷8.3
X=2
(2) 2X+16=64
解: 2X+16-16=64-16
2X=48
X=48÷2
X=24
(3) 1.3X÷2=2.6
解:判坦闷 1.3X÷2×2=2.6×2
1.3X=5.2
X=5.2÷1.3
X=4
(4) 4.5X+X=11
解: 5.5X=11
X=11÷5.5
X=2
(5) 2X-9=3.2
解: 2X-9+9=3.2+9
2X=12.2
X=12.2÷2
X=6.1
(6) (1-25%)X=72
解: 0.75X=72
X=72÷0.75
X=96
(7) (X+1/2X)=1/信则5
解: 3/2X=1/5
X=1/5÷3/2
X=1/5×2/3
X=2/15
(8) (1+10%)X=1.1
解: 1.1X=1.1
X=1.1÷1.1
X=1
(9) (2/3+1/3)X=9
解: 1X=9
X=9÷1
X=9
(10) (25%+46%)X=1.42
解: 0.71X=1.42
X=1.42÷1.72
X=2
展开全部
(1)4.5X+3.8X=16.6
解:8.3X=16.6
X=16.6÷8.3
X=2
(2)2X+16=64
解:2X+16-16=64-16
2X=48
X=48÷2
X=24
(3)1.3X÷2=2.6
解:1.3X÷2×2=2.6×2
1.3X=5.2
X=5.2÷1.3
X=4
(贺冲4)4.5X+X=11
解:5.5X=11
X=11÷5.5
X=2
(5)2X-9=3.2
解:2X-9+9=3.2+9
2X=12.2
X=12.2÷2
X=6.1
(6)(1-25%)X=72
解:0.75X=72
X=72÷0.75
X=96
(7)(X+1/2X)=1/5
解:3/2X=1/乱袜5
X=1/5÷3/2
X=1/5×2/3
X=2/15
(8)(1+10%)X=1.1
解:禅陪歼1.1X=1.1
X=1.1÷1.1
X=1
(9)(2/3+1/3)X=9
解:1X=9
X=9÷1
X=9
(10)(25%+46%)X=1.42
解:0.71X=1.42
X=1.42÷1.72
X=2
解:8.3X=16.6
X=16.6÷8.3
X=2
(2)2X+16=64
解:2X+16-16=64-16
2X=48
X=48÷2
X=24
(3)1.3X÷2=2.6
解:1.3X÷2×2=2.6×2
1.3X=5.2
X=5.2÷1.3
X=4
(贺冲4)4.5X+X=11
解:5.5X=11
X=11÷5.5
X=2
(5)2X-9=3.2
解:2X-9+9=3.2+9
2X=12.2
X=12.2÷2
X=6.1
(6)(1-25%)X=72
解:0.75X=72
X=72÷0.75
X=96
(7)(X+1/2X)=1/5
解:3/2X=1/乱袜5
X=1/5÷3/2
X=1/5×2/3
X=2/15
(8)(1+10%)X=1.1
解:禅陪歼1.1X=1.1
X=1.1÷1.1
X=1
(9)(2/3+1/3)X=9
解:1X=9
X=9÷1
X=9
(10)(25%+46%)X=1.42
解:0.71X=1.42
X=1.42÷1.72
X=2
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